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IEC efficiency standard

The International Electrotechnical Commission (the IEC) developed the IE energy efficiency standard in order to confront the problem of nations having different standards for energy efficiency.

IE codes are a measurement tool for the efficiency class of motors. The new EN 60034-30:2009 gives the world a definition of the following efficiency classes of low-voltage three phase asynchronous motors in the power range from 0.75 kW to 375 kW.

IE1 = Standard Efficiency (comparable to EFF2)

IE2 = High Efficiency (comparable to EFF1)

IE3 = Premium Efficiency

The old European designations EFF3, EFF2 and EFF1 will not become invalid, but will gradually disappear from the market.